CVE-2021-31216Network attack vector

Authenticated SSRF via unrestricted image proxy URL

Published Jul 19, 2021 · Updated Aug 3, 2024

SSRF in the image proxy route in Siren Investigate before 11.1.1 allows remote authenticated users to fetch arbitrary URLs. The default-enabled route accepts an arbitrary URL parameter and retrieves that destination as the Investigate host process without restricting the target. Access to the Investigate installation is required, and requests originate from the host, exposing resources reachable by that process.

CVSS severity8.1
High
EPSS probability0.72%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

SSRF in the image proxy route in Siren Investigate before 11.1.1 allows remote authenticated users to fetch arbitrary URLs. The default-enabled route accepts an arbitrary URL parameter and retrieves that destination as the Investigate host process without restricting the target. Access to the Investigate installation is required, and requests originate from the host, exposing resources reachable by that process.

The record

CVE
CVE-2021-31216
Published
Jul 19, 2021
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-918, CAPEC-664
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 19, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.5NIST NVDAV:N/AC:L/Au:S/C:P/I:P/A:N
8.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-918Server-Side Request Forgery (SSRF)
CAPEC-664Server Side Request Forgery

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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